Gunpowder press and grainer



(No Model.) 2 Sheets-Sheet 1.

P. A. OLIVER.

GUNPOWDER PRESS AND GRAINER.

a Patented Feb.- 28, 1888.

M/VENTUI? Md. @[Z/w By WWW ATTORNEY WITNESSES:

(No Model.) 2 SheetsShet 2.

- P.'A. OLIVER.

GUNPOWDER PRESS AND GRAINER.

Patented Feb. 28, 1888.

B7 WM l/VVE/VTO/i ATTORNEY lUsi lTlE rarns PAUL AMBROSE OLIVER, OF OLIVERS MILLS, PENNSYLVANIA.

GUNPOWDER PRESS AND GRAINER.

SPECIFICATION forming part of Letters Patent No. 378,516, dated February 28, 1888. Application filed June 14, 1887. Serial No. 241,270. (No model.)

To CLZZ whom, it 71mg concern:

Be it known that I, PAUL AMBROSE OLIVER, a citizen of the United States, residing at Olivers Mills, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in a Gunpowder Press and Grainer; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines for pressing and graining gunpowder. Patents for this purpose were issued to me, No. 101,032, dated March 22, 1870, and No. 134,438, dated December 31, 1872.

This invention consists in the novel construction and combination of the apparatus,

hereinafter fully described and claimed, which is an improvement upon the old machines and operates in a very superior manner.

I11 the drawings, Figure 1 is a longitudinal vertical section through the entire apparatus. Fig. 2 is an end elevation of a portion of the apparatus. Figs. 2 and 3 and 4 and 5 are respectively end and side views of the graiuerrolls. Figs. 6, 7, and 8 are respectively a plan, a side elevation, and an end view of the scraper.

A is one of the side frames of the presser and graincr, the other side frame being similar to it.

P is a hopper into which the finely-ground powder from the mill is placed.

O G are the press-rolls, journaled at the lower part of the hopper between the side frames and which press the fine moist powder into rough fiat cakes.

I) D are the upper grainingrolls, driven at equal or unequal speed, of which D is grooved, so that it cuts the rough cakes into small pieces. The rolls E E are also graining-rolls, and both are smooth. The grooves on roll D have straight tapering sides, forming sharp knife like ed gcs. As the pressed powder cake passes between the grooved roll and the smooth roll, the sharp edges of the grooved roll out it against the smooth roll and form it into cakes of moderate size, but do not crush or break the powder cake, the object being to cut it up only, forming as little fine dust as possible. The roll E is driven at a greater speed than roll E, to finel y granulatc the powder, the intergearing wheels 6 c, which connect the rolls, being of different diameters, as shown in Fig. 4. The fast-driving roll E and the roll D are each provided with a scraper, H, for cleaning them. These scrapers conform to the outline of the rolls, but otherwise are exactly alike. The slow-moving roll does not require a scraper, as the motion of the fast-moving roll keeps it clean.

F is a cross-bar pivoted upon the screws a to the sideframes. This cross-bar is provided with elongated bolt-holes K and bolts J, for securing the scraper H and adjusting it laterally when grooved. It has also the arms F projecting from it on the opposite side of thepivots from the scraper.

F are thumb screws working in screwthreaded lugsf, projecting from theside frames, which screws bear upon the ends of the arms and afford a means for setting up the scrapers against the rolls.

The granulated powder falls from rolls E E onto the conveyor-belt L which works over rollers L Land discharges the powder into the double screen L. The coarse grains pass over the upper screen into hopper M, the medium grains pass over the lower screen down into the chute M, and the fine dust falls through hopper N onto the conveyer-belt N.

M M are grainer-rolls similar to rolls E E. They granulate the coarse grains from hopper M and allow the powder to fall upon the elevator-belt N, together with the powder from the chute M.

The elevator-belt N works over rollers O and discharges the powder into the double screen L". The coarse grains pass over the upper screen, down the chute P and onto the elevatorQ. The good grains pass over the lower screen and into the hopper P, from whence they may be removed as they accumulate, and the fine dust falls through the hopper P onto the said conveyor-belt N.

P are the rollers over which the conveyorbelt N works. This belt N conveys the fine dust from hoppers N and P and discharges it onto a similar conveyer-belt, S, working over rollers N 3 N", which in turn delivers it onto the elevator-belt Q. The elevator-belt Q, works over rollers Q, raises all the coarse grains from chute and the fine dust from belt S, and delivers the same down the chute Q into the aforesaid hopper P, to be reacted on by the pressrolls.

The double screens L and L are preferably shaking screens; but stationary inclined or revolving screens may also be used.

What I claim isl. The combination of a pair of revoluble press-rolls for forming the ground powder into cakes, a pair of revoluble grainingrolls, one roll being grooved to out up the cakes, a see ond pair of revoluble smooth graining-rolls driven at unequal speed, and a frame-work supporting all the said rolls in horizontallyarranged pairs, substantially as and for the purpose set forth.

- forth.

2. The combination of a pair of revoluble press-rolls for forming the ground powder into cakes, a pair of graining-rolls journaled be- 20 neath the press-rolls, one roll being grooved to cut up said cakes, and a frame-work supporting the said rolls in horizontally-arranged pairs, substantially as and for the purpose set In testimony whereof I affix my signature in presence of two witnesses.

CHAS. P. HUNT, GEO. GUNTZ. 

